2008 Chevy Suburban 1500 low tire light stays on constantly. I can read every tire pressure from the display and all are good. I have rotated tires and have reprogrammed the tpms to the new locations but light stays on

 

I wont even replace mine when I need new tires. I have no need for a tire air-pressure warning system. I'll put a piece of tape over the light and keep driving.

 

It can be 2 things: 1) the Placard Pressure was changed or 2) the Key module needs to be re-flashed. Do you have access to a scan tool to pull any possible DTC's and/or pull the current Placard Pressure the vehicle thinks it needs to be set to?

 

One of your tire pressure sensors is bad and needs to be replaced, but it's not a must in order to drive the truck or what not. Only if you find the light on the dash annoying. I however have gotten use to mine bc I'm cheap lol.

 

How can it be a bad sensor when reported t.p. is “IN SPEC” And Tire pos. relearn was successful ?
You have No Clue .

 

The battery in the sensor is dead, they don't last forever and can't be replaced and a 2008 is 12 years old. Mine went dead at about 8 years so you done good. By new ones and replace then all when you replace tires.

https://www.rockauto.com/en/catalog/...)+sensor,12036

 

Sensors are only THREE years old and all were replaced at the same time then .

 

Go to Auto Zone and have them do a scan for any codes and reset if any are found. They don't charge to do it.

 

I discussed this at length with another mechanic and we somewhat agree that apparently when I replaced ALL the sensors 3 years ago apparently those had sat upon a shelf somewhere for some time and one sensor has a weak battery .
I’ll just reorder and replace them all again . I’ll also ask the Manufacturer of my Diagnostic tool why there is no coverage for ‘07-‘13 Silverados or GMC Sierras .
Thanks for the reply